Adjustments of engineering instruments and field problems in surveying (1905)
Prouty, Edward N[athan] 1868- [from old catalog] · Oakland, Cal., Press of Daily gazette] · leaf 23
lengths.Run out a series of courses ab, be. cd. de, laying out rightangles at b, c, and d, successively by the 3, 4, 5 method. This is best done, if you have aa 50-ft. chain, by finding a pointg, in the line ab, 15 ft from b,then with one end of chain at gand the 45-ft. link at b pull eachportion… … 20 duce the direction bh on to c and repeat, until finally* e isreached, paying no attention meanwhile to the location ofa. Note the location of e with respect to a in distance and distance eadirection. Error of closure =—-—— . —— total perimeter abcde 2. Chain around an imaginary obstacle as shown…
Surveying
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